34 lines
911 B
C++
34 lines
911 B
C++
#pragma once
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#include <optional>
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#include <string_view>
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#include "util.hh"
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namespace nix {
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// If `separator` is found, we return the portion of the string before the
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// separator, and modify the string argument to contain only the part after the
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// separator. Otherwise, wer return `std::nullopt`, and we leave the argument
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// string alone.
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static inline std::optional<std::string_view> splitPrefixTo(std::string_view & string, char separator) {
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auto sepInstance = string.find(separator);
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if (sepInstance != std::string_view::npos) {
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auto prefix = string.substr(0, sepInstance);
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string.remove_prefix(sepInstance+1);
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return prefix;
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}
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return std::nullopt;
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}
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static inline bool splitPrefix(std::string_view & string, std::string_view prefix) {
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bool res = hasPrefix(string, prefix);
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if (res)
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string.remove_prefix(prefix.length());
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return res;
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}
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}
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